1.0 rigid or flexible coupling? - Maska

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29 Νοε 2013 (πριν από 3 χρόνια και 8 μήνες)

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Baldor’s Mission Statement


is to be the best
(as determined by our customers)
marketers, designers and
manufacturers of industrial
electric motors, mechanical
power transmission products,
drives, and generators.

MASKA 2009
-
M2

1.


Couplings

2.


Weld
-
on hub (XT & QD)

3.


QD Short Bushing

4.


1VP& 2VP PULLEYS

COMPLEMENTARY MASKA PRODUCTS

MASKA 2009
-
M2

1.0 RIGID OR FLEXIBLE COUPLING?


Used to connect shafts that are

precisely aligned

Rigid coupling


Flexible coupling


Accommodates misalignment


Dampen vibrations or shock load


Used for most industrial applications, rather

than rigid coupling, because of these multiple

functions

MASKA 2009
-
M2

1.0.1 TYPES OF FLEXIBLE COUPLINGS

A. Metallic types

B. Elastomeric types


Torsional stiffness


Operates in relatively high ambient temperature and/or in presence

of certain oils or chemicals


Electric motor drive only
-

not recommended for combustion engine


Applications with relatively constant loads


Torsional softness (absorbs shock and vibration)


Allows more angular misalignment between shafts


Lower cost and lighter weight


Smoother and quieter operations

MASKA 2009
-
M2

1.0.2 Flexible coupling


-

Elastomeric types


Maska Starflex:



compression type

can transmit more

torque in less space and easy

to install


4
-
FLEX:



shear type

allows torsional wind
-
up and


transmits higher torque


Maskaflex:



shear type

coupling generally produces


lower shaft loads when submitted to parallel


offset misalignment


MASKA 2009
-
M2

1.1 Jaw Coupling


-

compression type


First patented in 1927



Simple design
-

three components: two hubs and one
elastomeric element



It is called a compression type coupling, because torque is
transmitted by conversion between the driver hub and the
driven hub

MASKA 2009
-
M2

1.1.1 Features of Maska

Starflex

coupling


Fail
-
safe when equipment cannot be allowed to stop. If the
elastomeric element should fail, the coupling will still transmit the
torque due to the metal
-
to
-
metal contact.



Great capability to handle torque over loads or spike



Simple to install, compact and low cost



Angular misalignment

is more limited than

in shear
-
design

MASKA 2009
-
M2

1.1.2 Maska

Starflex

coupling

MASKA 2009
-
M2

1.1.3 Element material

A. NBR


Buna
-
N


B. Urethane


C. Hytrel


D. Bronze

MASKA 2009
-
M2

1.1.4 Element material
-

NBR

Most commonly used element material
for all general applications
-

Pumps,
gear box, etc.

MASKA 2009
-
M2

1.1.5 Element material
-

Urethane


Greater torque capacity than rubber



Good abrasion / wear resistance



Better resistance to environmental conditions such as ozone,
ultraviolet and some oils or chemicals agents.



Should not be used in cyclic or start/stop applications



Limited to 160
°
F


MASKA 2009
-
M2

1.1.6 Element material
-

Hytrel


Higher torque capacity than rubber and urethane



Best chemical resistance, compared to urethane and
maximum temperature of 250
°
F



Angular misalignment less than urethane and rubber. 1/2
°

compare to 1
°



As urethane, should not be use in frequent start/stop
applications or regular shocks and vibrations

MASKA 2009
-
M2

1.1.7 Element material
-

Bronze


Not elastomeric, but an option for high temperatures, such as 450
°
F



Could be used in salt/marine applications



Only used in slow speeds, generally below 250 rpm, since it’s a
metal
-
to
-
metal contact which increases wear


MASKA 2009
-
M2

1.1.8 Element material

ELEMENT
Temperature
Dampening
Chemical
Color
Angular (deg.)
Parallel (in.)
capacity
Resistance
Rubber (NBR) - Buna N
-40 + 212 F
1-2
.015
HIGH
GOOD
Black
URETHANE
-30 + 160 F
1
.015
LOW
VERY GOOD
Orange
HYTREL
-60 + 250 F
1/2
.015
LOW
EXCELLENT
Tan
BRONZE
-40 + 450 F
1/2
.010
NONE
EXCELLENT
Bronze
MISALIGNEMENT
Technical Chart



Maska
Starflex

element

MASKA 2009
-
M2

1.1.9 Maska

Starflex

coupling selection


Coupling selection



Rated Torque chart



MASKA 2009
-
M2

1.2

4
-
FLEX



-

Shear type

MASKA 2009
-
M2


4
-
way flexing action



All types & sizes in cast iron



No lubrication; smooth, quiet power transmission


Fast & easy installation; no special tools or
accessories required



Precise concentrical product to avoid run
-
out and
unbalance



Flanges and sleeves manufactured in Canada

1.2.1 4
-
FLEX



Product description

MASKA 2009
-
M2



Tight bore tolerance (+.0005 / +.0015)



Over 1000 HP @ 1750 rpm



J & S flanges are bored to size



B flanges are mounted with a QD bushing



1.2.2 4
-
FLEX



Technical Features

MASKA 2009
-
M2

SHAPES AVAILABLE

EPDM


Hytrel


1 pc, unsplit

JE

H

1 pc, split

JES

-

2 pieces

E

HS

TYPICAL USE


General Purpose


General Purpose

REL. RATING

1X

4X

WIND
-
UP ANGULAR

15
°


7
°


MISALIGN

1
°


1/4
°


TEMPERATURE (F)





maximum

+275
°


+250
°


minimum


30
°



65
°


1.2.3

4
-
FLEX


General Characteristics

MASKA 2009
-
M2

1.3 Features of



Maskaflex

coupling


Compared to other couplings in the industry, the tire
coupling is the most suitable for applications with shock
loads, angular misalignment up to 4 degrees or end float up
to ¼ inches.




It is made of natural rubber and reinforced tension member
bonded together. The element has a special series

of cables near the flange attachment that offers

longer life expectancy and prevents premature

shear failure.


MASKA 2009
-
M2

1.3.1 Features of

Maskaflex

coupling

ANGULAR MISALIGNEMENT

Up to 4 deg.

AXIAL OFFSET

Up to 0.25
"


PARALLEL MISALIGNEMENT

Up to 0.125
"

MASKA 2009
-
M2

2.0 WELD
-
ON HUBS FAMILY


1) QD SERIES
-

GENERAL APPLICATIONS

2) XT SERIES
-

CONVEYOR PULLEY

************************************************************

WELD
-
ON HUBS ARE MADE OF STEEL TO FACILITATE WELDING

************************************************************


MASKA 2009
-
M2

2.1 Weld
-
On Hub QD

H


QD PART#


**All size available excepted “S” **

Hub
fits Bushing
Type
H-L
L
2
H-CL
L
2
H-JA
JA
1
H-SH
SH
1
H-SDS
SDS
1
H-SK
SK
1
H-SF
SF
1
H-E
E
1
H-F
F
1
H-J
J
1
H-M
M
2
H-N
N
2
H-P
P
2
H-W
W
2
MASKA 2009
-
M2

2.1 Weld
-
On Hub QD

Product Features & applications


The QD weld
-
on hub are used in a wide range of
applications such as plate steel sprocket, conveyor
and fan blades.



All Maska Weld
-
on hub are made of steel since cast
iron is difficult to weld. Once a material contains a high
level of carbon, this will reduce welding capabilities.



Maska QD bushings have a synchronized keyway with
bolt holes so they can be easily used once two of these
need to be installed face to face on the same keyed
shaft


MASKA 2009
-
M2

2.2 XT HUBS & BUSHINGS

MASKA 2009
-
M2

2.3 XT Conveyor pulley

MASKA 2009
-
M2

2.4 XT Hubs & Bushings


Not interchangeable with QD or any other bushing
even if it has a similar design.


Supply with hexagonal head cap screws and spring
lock washers like QD bushings for installation.


Van Gorp / Browning is the original manufacturer of
these kind of weld
-
on hubs


Product features

MASKA 2009
-
M2

2.4 XT Hubs & Bushings


Taper is 2" per foot compared to QD which has ¾
per foot.




XT bushings are shorter compared to QD and will
only fit in these hubs (XTH).



Only sizes XTB100 & XTB120 are
made of gray
cast iron.

MASKA 2009
-
M2

2.5 XT HUB & BUSHING DESIGNATION

MASKA

OFFERS STANDARD SIZES

Bushing
Max. bore (IN.)
XTB 15
1-1/2
XTB 20
2
XTB 25
2-7/16
XTB 30
2-15/16
XTB 35
3-7/16
XTB 40
3-15/16
XTB 45
4-7/16
XTB 50
4-15/16
XTB 60
5-15/16
XTB 70
6-15/16
XTB 80
7-15/16
XTB 100
10
XTB 120
12

Bore sizes in stock match with popular
bearing housing sizes to support the
shaft
-
conveyor pulley assembly.



XTB Series number corresponds
approximately to the max. bore per
model like Taper
-
Lock bushings
nomenclature



MASKA 2009
-
M2

3.0 Short QD bushings

Standard QD “J”

short QD “J”

MASKA 2009
-
M2

3.0 QD BUSHING “SHORT”



Same features than the QD but with a shorter barrel or
taper length.

100% interchangeable with competitors.



Short QD bushings are only available from J through S.



Supplied with shorter Hexagonal bolts than QD but still
comes with set screw and lock washers



Would not be appropriate on v
-
belt pulley since
stability is required for multiple grooves pulley so they
are generally used face to face with conveyor pulley or
alone with a steel plate sprocket, blade, impellers that
are not too wide.

MASKA 2009
-
M2

4.0 VP
-

SERIES DESIGNATION

MASKA

OFFERS ALL SIZES

1VP
2VP
1VP25
2VP36
1VP30
2VP42
1VP34
2VP50
1VP40
2VP56
1VP44
2VP60
1VP50
2VP62
1VP56
2VP65
1VP60
2VP68
1VP62
2VP71
1VP65
2VP75
1VP68
1VP71
1VP75
MASKA 2009
-
M2

4.1 Variable pitch


sheaves
-

VP series


The VP series is equivalent to 8000 series. The 8000
series generally offers a wider range of speed.



Designed for A (4L), B (5L) and 5V belts. 3L could also
be used



Offers half turn adjustment up to 6 turns.



All made of gray cast iron


1VP & 2VP

MASKA 2009
-
M2

4.2 VP types

TYPE 2
-

WITH A KEY THROUGH THE HUB

TYPE1
-

WITHOUT A KEY ONLY


SET SCREWS OVER THE HUB


****Only one set screw per flange like Browning****


MASKA 2009
-
M2